Lid for a cup



FIG. 1 is a front view of a lid for a cup showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left view thereof; and,

FIG. 6 is a perspective view thereof, shown in a position of use with an exemplary cup.

The evenly broken lines in the drawings represent exemplary environmental subject matter of a cup. None of the broken lines form part of the claimed design. 

CLAIM The ornamental design for a lid for a cup, as shown and described. 